drm/nvc0/pm: initial engine reclocking

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.h b/drivers/gpu/drm/nouveau/nouveau_pm.h
index 7e0cc2e..2f8e14f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_pm.h
+++ b/drivers/gpu/drm/nouveau/nouveau_pm.h
@@ -72,6 +72,8 @@
 
 /* nvc0_pm.c */
 int nvc0_pm_clocks_get(struct drm_device *, struct nouveau_pm_level *);
+void *nvc0_pm_clocks_pre(struct drm_device *, struct nouveau_pm_level *);
+int nvc0_pm_clocks_set(struct drm_device *, void *);
 
 /* nouveau_temp.c */
 void nouveau_temp_init(struct drm_device *dev);